Guam Power Authority
State electric utility · Guam · #344 of 3,199 U.S. utilities by customers · EIA utility #40428
Guam Power Authority is a state electric utility serving 53,718 customers in Guam. In 2025 it sold 1,586 gigawatt-hours of electricity for $494.29M in revenue, an average realized rate of 31.18¢ per kWh across all customer classes and 30.93¢ per kWh for residential customers. Its reported service territory covers 1 counties. EIA records its activities as: generation, transmission, distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 45,885 | 543 | $168.02M | 30.93¢ | |
| Commercial | 7,833 | 1,042 | $326.27M | 31.30¢ | |
| Total | 53,718 | 1,586 | $494.29M | 31.18¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (986 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 52,264 | 1,555 | $324.23M | 19.95¢ |
| 2022 | 52,873 | 1,540 | $473.56M | 30.16¢ |
| 2023 | 53,010 | 1,448 | $548.68M | 38.03¢ |
| 2024 | 53,559 | 1,556 | $542.78M | 34.83¢ |
| 2025 | 53,718 | 1,586 | $494.29M | 30.93¢ |
Reliability (2025)
Average outage time (SAIDI): 458 minutes per customer per year
Average outages (SAIFI): 8.73 per customer
Average restoration time (CAIDI): 52 minutes
As reported for Guam under the Other standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 1,690 GWh
Wholesale power purchased: — GWh
Winter peak demand: 244 MW
Energy losses: 6.0% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.9% of 52,474 meters
Customer-sited generation (net metering): 2,949 installations, 39.7 MW of capacity
Counties served
Guam, GU
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #40428 in the EIA frame.